College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, PR China.
The Modernization Engineering Technology Research Center of Ethnic Minority Medicine of Hubei Province, College of Pharmacy, South-Central Minzu University, Wuhan 430074, PR China.
Spectrochim Acta A Mol Biomol Spectrosc. 2022 Oct 5;278:121273. doi: 10.1016/j.saa.2022.121273. Epub 2022 Apr 15.
An effective method to discriminate Baijiu carries important applications for grade identification and quality control in the Baijiu industry. Herein, we report on a novel and straightforward dual-channel fluorescence sensor array for flavor compounds (FCs) and Chinese Baijiu discrimination. Unit 1 (U1) is the reaction between o-phenylenediamine (OPD) and pyrocatechol (ODHB), and unit 2 (U2) is the reaction between 3,4-diaminotoluene (3,4-DAT) and ODHB. The fluorescent products were changed via FCs in Baijiu relying on the influence of protonation of the amino group on OPD/3,4-DAT and chemical reactions. The array successfully achieves qualitative and quantitative identification of FCs with low detection limits and wide linear ranges. In addition, qualitative identification of 0.7 mmol/L FCs in Baijiu is achieved. Finally, this is applied to discriminate 32 Baijius varieties with different aromas, brands, and grades. The fluorescence sensor array is reliable and straightforward for FCs identification and Baijius discrimination, which is of great significance for authenticity identification in the Baijiu industry.
一种有效的白酒鉴别方法，对白酒行业的分级鉴定和质量控制具有重要的应用价值。本文报道了一种新颖、直接的双通道荧光传感器阵列，用于风味化合物（FCs）和中国白酒的鉴别。单元 1（U1）是邻苯二胺（OPD）和邻苯二酚（ODHB）之间的反应，单元 2（U2）是 3,4-二氨基甲苯（3,4-DAT）和 ODHB 之间的反应。白酒中的 FCs 通过影响 OPD/3,4-DAT 上氨基的质子化和化学反应，改变荧光产物。该阵列成功地实现了对 FCs 的定性和定量识别，具有低检测限和宽线性范围。此外，还实现了对 0.7mmol/L 白酒中 FCs 的定性识别。最后，该方法应用于鉴别 32 种具有不同香气、品牌和等级的白酒。荧光传感器阵列在 FCs 识别和白酒鉴别方面具有可靠性和简便性，对白酒行业的真实性鉴别具有重要意义。
